$OpenBSD: patch-version_sh,v 1.7 2014/05/16 01:34:50 brad Exp $
--- version.sh.orig	Tue Mar 11 01:57:36 2014
+++ version.sh	Tue Mar 11 02:39:44 2014
@@ -2,6 +2,9 @@
 
 # Usage: version.sh <ffmpeg-root-dir> <output-version.h> <extra-version>
 
+revision=$(cd "$1" && cat snapshot_version 2> /dev/null)
+test "$revision" && revision=git-$revision
+
 # check for git short hash
 if ! test "$revision"; then
     revision=$(cd "$1" && git describe --tags --match N 2> /dev/null)
